| 1 | // Game object: { |
| 2 | // // Static informations: |
| 3 | // gameId: string |
| 4 | // vname: string, |
| 5 | // fenStart: string, |
| 6 | // players: array of sid+id+name, |
| 7 | // timeControl: string, |
| 8 | // increment: integer (seconds), |
| 9 | // mode: string ("live" or "corr") |
| 10 | // imported: boolean (optional, default false) |
| 11 | // // Game (dynamic) state: |
| 12 | // fen: string, |
| 13 | // moves: array of Move objects, |
| 14 | // clocks: array of integers, |
| 15 | // initime: integer (when clock start running), |
| 16 | // score: string (several options; '*' == running), |
| 17 | // } |
| 18 | |
| 19 | function dbOperation(callback) |
| 20 | { |
| 21 | let db = null; |
| 22 | let DBOpenRequest = window.indexedDB.open("vchess", 4); |
| 23 | |
| 24 | DBOpenRequest.onerror = function(event) { |
| 25 | alert("Database error: " + event.target.errorCode); |
| 26 | }; |
| 27 | |
| 28 | DBOpenRequest.onsuccess = function(event) { |
| 29 | db = DBOpenRequest.result; |
| 30 | callback(db); |
| 31 | db.close(); |
| 32 | }; |
| 33 | |
| 34 | DBOpenRequest.onupgradeneeded = function(event) { |
| 35 | let db = event.target.result; |
| 36 | db.onerror = function(event) { |
| 37 | alert("Error while loading database: " + event.target.errorCode); |
| 38 | }; |
| 39 | // Create objectStore for vchess->games |
| 40 | db.createObjectStore("games", { keyPath: "gameId" }); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | export const GameStorage = |
| 45 | { |
| 46 | // Optional callback to get error status |
| 47 | add: function(game, callback) |
| 48 | { |
| 49 | dbOperation((db) => { |
| 50 | let transaction = db.transaction("games", "readwrite"); |
| 51 | if (callback) |
| 52 | { |
| 53 | transaction.oncomplete = function() { |
| 54 | callback({}); //everything's fine |
| 55 | } |
| 56 | transaction.onerror = function() { |
| 57 | callback({errmsg: "addGame failed: " + transaction.error}); |
| 58 | }; |
| 59 | } |
| 60 | let objectStore = transaction.objectStore("games"); |
| 61 | objectStore.add(game); |
| 62 | }); |
| 63 | }, |
| 64 | |
| 65 | // TODO: also option to takeback a move ? |
| 66 | // NOTE: for live games only (all on server for corr) |
| 67 | update: function(gameId, obj) //colorIdx, move, fen, addTime, initime, score |
| 68 | { |
| 69 | dbOperation((db) => { |
| 70 | let objectStore = db.transaction("games", "readwrite").objectStore("games"); |
| 71 | objectStore.get(gameId).onsuccess = function(event) { |
| 72 | const game = event.target.result; |
| 73 | if (!!obj.move) |
| 74 | { |
| 75 | game.moves.push(obj.move); |
| 76 | game.fen = obj.fen; |
| 77 | if (!!obj.addTime) //NaN if first move in game |
| 78 | game.clocks[obj.colorIdx] += obj.addTime; |
| 79 | } |
| 80 | if (!!obj.initime) //just a flag (true) |
| 81 | game.initime = Date.now(); |
| 82 | if (!!obj.score) |
| 83 | game.score = obj.score; |
| 84 | objectStore.put(game); //save updated data |
| 85 | } |
| 86 | }); |
| 87 | }, |
| 88 | |
| 89 | // Retrieve any live game from its identifiers (locally, running or not) |
| 90 | // NOTE: need callback because result is obtained asynchronously |
| 91 | get: function(gameId, callback) |
| 92 | { |
| 93 | dbOperation((db) => { |
| 94 | let objectStore = db.transaction('games').objectStore('games'); |
| 95 | if (!gameId) //retrieve all |
| 96 | { |
| 97 | let games = []; |
| 98 | objectStore.openCursor().onsuccess = function(event) { |
| 99 | let cursor = event.target.result; |
| 100 | // if there is still another cursor to go, keep running this code |
| 101 | if (cursor) |
| 102 | { |
| 103 | games.push(cursor.value); |
| 104 | cursor.continue(); |
| 105 | } |
| 106 | else |
| 107 | callback(games); |
| 108 | } |
| 109 | } |
| 110 | else //just one game |
| 111 | { |
| 112 | objectStore.get(gameId).onsuccess = function(event) { |
| 113 | callback(event.target.result); |
| 114 | } |
| 115 | } |
| 116 | }); |
| 117 | }, |
| 118 | |
| 119 | // Delete a game in indexedDB |
| 120 | remove: function(gameId, callback) |
| 121 | { |
| 122 | dbOperation((db) => { |
| 123 | let transaction = db.transaction(["games"], "readwrite"); |
| 124 | if (callback) |
| 125 | { |
| 126 | transaction.oncomplete = function() { |
| 127 | callback({}); //everything's fine |
| 128 | } |
| 129 | transaction.onerror = function() { |
| 130 | callback({errmsg: "removeGame failed: " + transaction.error}); |
| 131 | }; |
| 132 | } |
| 133 | transaction.objectStore("games").delete(gameId); |
| 134 | }); |
| 135 | }, |
| 136 | }; |